Product Features: 
1.Auto On When you connect to the power, So its very good for to use in car or other you want it have auto on functions.

2.Dual Device Link: Simultaneously pair your smartphone and tablet and stream music from either one with any stereo system that supports a standard 3.5mm or RCA jack.Connect two Bluetooth devices at once to listen to music, make phone calls, and more.

3.Connect two devices: Support to connect with 3.5mm audio port and 2 RCA audio port at the same time.

4.Wireless Music Streaming: Stereo stream music to non-Bluetooth headphones and speakers.

5.Super Stable Connection: Our Bluetooth audio adapter is fitted with a Bluetooth 5.0 chip for steady pairing, fast transmission and a wide signal range (33 feet). With the 3.5mm AUX port and 2 RCA port, it can be connected to non-Bluetooth car audio systems, home stereo, wired headphone/speaker, Amplifier/Home Theater.etc. Then you can enjoy wireless Hi-fi music streaming! Note: It's a vikefon Bluetooth receiver only, not a transmitter. So you couldn't use it for your TV, keyboard, mouse.

6.Auto-Connect:This Bluetooth receiver will automatically connect to the last paired Bluetooth device when you turn it on the next time.

7.3-KEY: Next song/Volume Up, Previous Song/Volume Down, Multifunction Button(MFB)

8. Upgraded to support U Disk play.

9.The New Upgrade,NFC Smart Connection,Seconds To Connect More Convenient And Faster.

10.HIFI Super Bass Sound,HD Stereo Audio Music.

11.Low Latency, High Fidelity, No noise, Restore CD-level HIFI Sound Quality

12.Support APP Remote Control: The world's first Bluetooth Audio Receiver supporting APP operation.
Android APP: "Bluetooth Partner"
Apple IOS APP:"BTmate"

13.Infrared Remote Control: Support 5-8 Meters Infrared Remote Control, Each Operation Is Simple And Convenient.

14.Long-Distance:15 Meters Long-distance Transmission And Reception Distance

15.Note: No built in battery,So POWERED BY USB CHARGING.

Product Parameter:
Product Name:M10 NFC Bluetooth Audio Receiver
Output Parameter:DC 5V
Bluetooth Version: V5.0+EDR
Bluetooth protocol: A2DP/AVRCP
Support Music Format: MP3/FLAC/WMA/APE/WAV
Bluetooth distance: 15 meters
Interface: RCA/AUX/USB
Frequency range: 10Hz-20kHz
Signal to noise ratio: >110dB
Impedance: 75Ω
Size: 88*62*21mm
Support Multiple Audio Output Ports: Can Connect With 3.5mm Headset, Stereo System, Speaker 
System Support: All Bluetooth audio device; NFC Available Device

Packing List:
1x M10 Bluetooth Audio Adapter
1x Type-C Charging cable 
1x Remote Control
1x User manual
NOTED: The 3.5mm AUX and RCA audio cable will not included if you not selected.